Method and apparatus of paging transmission and reception, system information window determination and uplink carrier selection

ABSTRACT

The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure provides a method and apparatus for paging transmission and reception, SI window determination and UL carrier selection.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Provisional Application No.62/752,953, filed Oct. 30, 2018 and Provisional Application No.62/757,050, filed Nov. 7, 2018, the disclosures of which areincorporated by reference herein in their entirety.

BACKGROUND 1. Field

The disclosure relates to a wireless communication system. Specifically,the disclosure relates to an apparatus, a method and a system of pagingtransmission and reception, system information window determination anduplink carrier selection in wireless communication system.

2. Description of Related Art

To meet the demand for wireless data traffic having increased sincedeployment of 4G communication systems, efforts have been made todevelop an improved 5G or pre-5G communication system. Therefore, the 5Gor pre-5G communication system is also called a ‘Beyond 4G Network’ or a‘Post LTE System’. The 5G communication system is considered to beimplemented in higher frequency (mmWave) bands, e.g., 60 GHz bands, soas to accomplish higher data rates. To decrease propagation loss of theradio waves and increase the transmission distance, the beamforming,massive multiple-input multiple-output (MIMO), Full Dimensional MIMO(FD-MIMO), array antenna, an analog beam forming, large scale antennatechniques are discussed in 5G communication systems. In addition, in 5Gcommunication systems, development for system network improvement isunder way based on advanced small cells, cloud Radio Access Networks(RANs), ultra-dense networks, device-to-device (D2D) communication,wireless backhaul, moving network, cooperative communication,Coordinated Multi-Points (CoMP), reception-end interference cancellationand the like. In the 5G system, Hybrid FSK and QAM Modulation (FQAM) andsliding window superposition coding (SWSC) as an advanced codingmodulation (ACM), and filter bank multi carrier (FBMC), non-orthogonalmultiple access (NOMA), and sparse code multiple access (SCMA) as anadvanced access technology have been developed.

The Internet, which is a human centered connectivity network wherehumans generate and consume information, is now evolving to the Internetof Things (IoT) where distributed entities, such as things, exchange andprocess information without human intervention. The Internet ofEverything (IoE), which is a combination of the IoT technology and theBig Data processing technology through connection with a cloud server,has emerged. As technology elements, such as “sensing technology”,“wired/wireless communication and network infrastructure”, “serviceinterface technology”, and “Security technology” have been demanded forIoT implementation, a sensor network, a Machine-to-Machine (M2M)communication, Machine Type Communication (MTC), and so forth have beenrecently researched. Such an IoT environment may provide intelligentInternet technology services that create a new value to human life bycollecting and analyzing data generated among connected things. IoT maybe applied to a variety of fields including smart home, smart building,smart city, smart car or connected cars, smart grid, health care, smartappliances and advanced medical services through convergence andcombination between existing Information Technology (IT) and variousindustrial applications.

In line with this, various attempts have been made to apply 5Gcommunication systems to IoT networks. For example, technologies such asa sensor network, Machine Type Communication (MTC), andMachine-to-Machine (M2M) communication may be implemented bybeamforming, MIMO, and array antennas. Application of a cloud RadioAccess Network (RAN) as the above-described Big Data processingtechnology may also be considered to be as an example of convergencebetween the 5G technology and the IoT technology.

Meanwhile, there have been various studies on paging, system informationacquisition, uplink carrier selection in 5G communication systemrecently.

The above information is presented as background information only toassist with an understanding of the disclosure. No determination hasbeen made, and no assertion is made, as to whether any of the abovemight be applicable as prior art with regard to the disclosure.

SUMMARY

Aspects of the disclosure are to address at least the above-mentionedproblems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of the disclosure is to providea communication method and system for converging a fifth generation (5G)communication system for supporting higher data rates beyond a fourthgeneration (4G).

In accordance with an aspect of the disclosure, a method of receiving apaging by a terminal is provided. The method comprises: receiving, froma base station, a system information block (SIB) including at least oneparameter for a paging; receiving, from the base station, a messageconfiguring a downlink bandwidth part (BWP), the message includinginformation indicating a first physical downlink control channel (PDCCH)monitoring occasion for a paging occasion (PO) of a paging frame (PF) onthe downlink BWP; and receiving, from the base station, a paging messageon the downlink BWP based on the at least one parameter and theinformation.

In accordance with another aspect of the disclosure, a method oftransmitting a paging by a base station is provided. The methodcomprises: transmitting, to a terminal, a system information block (SIB)including at least one parameter for a paging; transmitting, to theterminal, a message configuring a downlink bandwidth part (BWP), themessage including information indicating a first physical downlinkcontrol channel (PDCCH) monitoring occasion for a paging occasion (PO)of a paging frame (PF) on the downlink BWP; and transmitting, to theterminal, a paging message on the downlink BWP based on the at least oneparameter and the information.

In accordance with another aspect of the disclosure, a terminal ofreceiving a paging is provided. The terminal comprises: a transceiverconfigured to transmit and receive a signal; and a controller configuredto: receive, from a base station, a system information block (SIB)including at least one parameter for a paging, receive, from the basestation, a message configuring a downlink bandwidth part (BWP), themessage including information indicating a first physical downlinkcontrol channel (PDCCH) monitoring occasion for a paging occasion (PO)of a paging frame (PF) on the downlink BWP, and receive, from the basestation, a paging message on the downlink BWP based on the at least oneparameter and the information.

In accordance with another aspect of the disclosure, a base station oftransmitting a paging is provided. The base station comprises: atransceiver configured to transmit and receive a signal; and acontroller configured to: transmit, to a terminal, a system informationblock (SIB) including at least one parameter for a paging, transmit, tothe terminal, a message configuring a downlink bandwidth part (BWP), themessage including information indicating a first physical downlinkcontrol channel (PDCCH) monitoring occasion for a paging occasion (PO)of a paging frame (PF) on the downlink BWP, and transmit, to theterminal, a paging message on the downlink BWP based on the at least oneparameter and the information.

Before undertaking the DETAILED DESCRIPTION below, it may beadvantageous to set forth definitions of certain words and phrases usedthroughout this patent document: the terms “include” and “comprise,” aswell as derivatives thereof, mean inclusion without limitation; the term“or,” is inclusive, meaning and/or; the phrases “associated with” and“associated therewith,” as well as derivatives thereof, may mean toinclude, be included within, interconnect with, contain, be containedwithin, connect to or with, couple to or with, be communicable with,cooperate with, interleave, juxtapose, be proximate to, be bound to orwith, have, have a property of, or the like; and the term “controller”means any device, system or part thereof that controls at least oneoperation, such a device may be implemented in hardware, firmware orsoftware, or some combination of at least two of the same. It should benoted that the functionality associated with any particular controllermay be centralized or distributed, whether locally or remotely.

Moreover, various functions described below can be implemented orsupported by one or more computer programs, each of which is formed fromcomputer readable program code and embodied in a computer readablemedium. The terms “application” and “program” refer to one or morecomputer programs, software components, sets of instructions,procedures, functions, objects, classes, instances, related data, or aportion thereof adapted for implementation in a suitable computerreadable program code. The phrase “computer readable program code”includes any type of computer code, including source code, object code,and executable code. The phrase “computer readable medium” includes anytype of medium capable of being accessed by a computer, such as readonly memory (ROM), random access memory (RAM), a hard disk drive, acompact disc (CD), a digital video disc (DVD), or any other type ofmemory. A “non-transitory” computer readable medium excludes wired,wireless, optical, or other communication links that transporttransitory electrical or other signals. A non-transitory computerreadable medium includes media where data can be permanently stored andmedia where data can be stored and later overwritten, such as arewritable optical disc or an erasable memory device.

Definitions for certain words and phrases are provided throughout thispatent document, those of ordinary skill in the art should understandthat in many, if not most instances, such definitions apply to prior, aswell as future uses of such defined words and phrases.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of certainembodiments of the disclosure will be more apparent from the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 illustrates determining paging frame (PF) and paging occasion(PO) according to an embodiment of the disclosure.

FIG. 2 illustrates determining PF and PO according to another embodimentof the disclosure.

FIG. 3 illustrates determining PF and PO according to another embodimentof the disclosure.

FIG. 4 illustrates determining PF and PO according to another embodimentof the disclosure.

FIG. 5 illustrates determining PF and PO according to another embodimentof the disclosure.

FIG. 6 illustrates determining PF and PO according to another embodimentof the disclosure.

FIG. 7 illustrates determining PF and PO according to another embodimentof the disclosure.

FIG. 8 illustrates determining PF and PO according to another embodimentof the disclosure.

FIG. 9 illustrates determining system information (SI) window accordingto another embodiment of the disclosure.

FIG. 10 illustrates determining SI window according to anotherembodiment of the disclosure.

FIG. 11 illustrates determining SI window according to anotherembodiment of the disclosure.

FIG. 12 illustrates a block diagram of a terminal according to anembodiment of the disclosure, and

FIG. 13 illustrates a block diagram of a base station according to anembodiment of the disclosure.

Throughout the drawings, like reference numerals will be understood torefer to like parts, components, and structures.

DETAILED DESCRIPTION

FIGS. 1 through 13, discussed below, and the various embodiments used todescribe the principles of the present disclosure in this patentdocument are by way of illustration only and should not be construed inany way to limit the scope of the disclosure. Those skilled in the artwill understand that the principles of the present disclosure may beimplemented in any suitably arranged system or device.

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of variousembodiments of the disclosure as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the various embodiments describedherein can be made without departing from the scope and spirit of thedisclosure. In addition, descriptions of well-known functions andconstructions may be omitted for clarity and conciseness.

The terms and words used in the following description and claims are notlimited to the bibliographical meanings, but, are merely used by theinventor to enable a clear and consistent understanding of thedisclosure. Accordingly, it should be apparent to those skilled in theart that the following description of various embodiments of thedisclosure is provided for illustration purpose only and not for thepurpose of limiting the disclosure as defined by the appended claims andtheir equivalents.

It is to be understood that the singular forms “a,” “an,” and “the”include plural referents unless the context clearly dictates otherwise.Thus, for example, reference to “a component surface” includes referenceto one or more of such surfaces.

By the term “substantially” it is meant that the recited characteristic,parameter, or value need not be achieved exactly, but that deviations orvariations, including for example, tolerances, measurement error,measurement accuracy limitations and other factors known to those ofskill in the art, may occur in amounts that do not preclude the effectthe characteristic was intended to provide.

It is known to those skilled in the art that blocks of a flowchart (orsequence diagram) and a combination of flowcharts may be represented andexecuted by computer program instructions. These computer programinstructions may be loaded on a processor of a general purpose computer,special purpose computer, or programmable data processing equipment.When the loaded program instructions are executed by the processor, theycreate a means for carrying out functions described in the flowchart.Because the computer program instructions may be stored in a computerreadable memory that is usable in a specialized computer or aprogrammable data processing equipment, it is also possible to createarticles of manufacture that carry out functions described in theflowchart. Because the computer program instructions may be loaded on acomputer or a programmable data processing equipment, when executed asprocesses, they may carry out operations of functions described in theflowchart.

A block of a flowchart may correspond to a module, a segment, or a codecontaining one or more executable instructions implementing one or morelogical functions, or may correspond to a part thereof. In some cases,functions described by blocks may be executed in an order different fromthe listed order. For example, two blocks listed in sequence may beexecuted at the same time or executed in reverse order.

In this description, the words “unit”, “module” or the like may refer toa software component or hardware component, such as, for example, afield-programmable gate array (FPGA) or an application-specificintegrated circuit (ASIC) capable of carrying out a function or anoperation. However, a “unit”, or the like, is not limited to hardware orsoftware. A unit, or the like, may be configured so as to reside in anaddressable storage medium or to drive one or more processors. Units, orthe like, may refer to software components, object-oriented softwarecomponents, class components, task components, processes, functions,attributes, procedures, subroutines, program code segments, drivers,firmware, microcode, circuits, data, databases, data structures, tables,arrays or variables. A function provided by a component and unit may bea combination of smaller components and units, and may be combined withothers to compose larger components and units. Components and units maybe configured to drive a device or one or more processors in a securemultimedia card.

Prior to the detailed description, terms or definitions necessary tounderstand the disclosure are described. However, these terms should beconstrued in a non-limiting way.

The “base station (BS)” is an entity communicating with a user equipment(UE) and may be referred to as BS, base transceiver station (BTS), nodeB (NB), evolved NB (eNB), access point (AP), 5G NB (5GNB), or gNB.

The “UE” is an entity communicating with a BS and may be referred to asUE, device, mobile station (MS), mobile equipment (ME), or terminal.

In the recent years several broadband wireless technologies have beendeveloped to meet the growing number of broadband subscribers and toprovide more and better applications and services. The second generationwireless communication system has been developed to provide voiceservices while ensuring the mobility of users. Third generation wirelesscommunication system supports not only the voice service but also dataservice. In recent years, the fourth wireless communication system hasbeen developed to provide high-speed data service. However, currently,the fourth generation wireless communication system suffers from lack ofresources to meet the growing demand for high speed data services. Sofifth generation wireless communication system is being developed tomeet the growing demand for high speed data services, supportultra-reliability and low latency applications.

The fifth generation wireless communication system will be implementednot only in lower frequency bands but also in higher frequency (mmWave)bands, e.g., 10 GHz to 100 GHz bands, so as to accomplish higher datarates. To mitigate propagation loss of the radio waves and increase thetransmission distance, the beamforming, massive MIMO, Full DimensionalMIMO, array antenna, an analog beam forming, large scale antennatechniques are being considered in the design of fifth generationwireless communication system. In addition, the fifth generationwireless communication system is expected to address different use caseshaving quite different requirements in terms of data rate, latency,reliability, mobility etc. However, it is expected that the design ofthe air-interface of the fifth generation wireless communication systemwould be flexible enough to serve the UEs having quite differentcapabilities depending on the use case and market segment the UE caterservice to the end customer. Few example use cases the fifth generationwireless communication system wireless system is expected to address isenhanced Mobile Broadband (eMBB), massive Machine Type Communication(m-MTC), ultra-reliable low latency communication (URLL) etc. The eMBBrequirements like tens of Gbps data rate, low latency, high mobility soon and so forth address the market segment representing the conventionalwireless broadband subscribers needing internet connectivity everywhere,all the time and on the go. The m-MTC requirements like very highconnection density, infrequent data transmission, very long batterylife, low mobility address so on and so forth address the market segmentrepresenting the Internet of Things (IoT)/Internet of Everything (IoE)envisioning connectivity of billions of devices. The URLL requirementslike very low latency, very high reliability and variable mobility so onand so forth address the market segment representing the Industrialautomation application, vehicle-to-vehicle/vehicle-to-infrastructurecommunication foreseen as one of the enabler for autonomous cars.

In the wireless communication system, a base station in a cellbroadcasts system information. System information includes commonparameters needed for a UE to communicate in cell. In the fifthgeneration wireless communication system (also referred as nextgeneration radio, new radio or NR), System Information (SI) is dividedinto the master information block (MIB) and a number of systeminformation blocks (SIBs) where:

-   -   the MIB is always transmitted on the broadcast channel (BCH)        with a periodicity of 80 ms and repetitions made within 80 ms        and it includes parameters that are needed for the UE to acquire        SIB1 from the cell.    -   the SIB1 is transmitted on the downlink shared channel (DL-SCH)        with a periodicity of 160 ms and variable transmission        repetition. The default transmission repetition periodicity of        SIB1 is 20 ms but the actual transmission repetition periodicity        is up to network implementation. SIB1 includes information        regarding the availability and scheduling (e.g. mapping of SIBs        to system information (SI) message, periodicity, SI-window size)        of other SIBs with an indication whether one or more SIBs are        only provided on-demand and, in that case, the configuration        needed by the UE to perform the SI request. SIB1 is        cell-specific SIB;    -   SIBs other than SIB1 are carried in SystemInformation (SI)        messages, which are transmitted on the DL-SCH. SIBs having the        same periodicity can be mapped to the same SI message.

In the 5th generation wireless communication system the paging istransmitted to page UE which are attached to the wireless communicationnetwork but are in idle/inactive mode. In the idle/inactive mode UE wakeups at regular intervals (i.e. every paging discontinuous reception(DRX) cycle) for short periods to receive paging and other broadcastinformation. The network may configure several paging occasions (POs) ina DRX cycle. In a PO, a paging message is transmitted using physicaldownlink shared channel (PDSCH). A physical downlink common controlchannel (PDCCH) is addressed to paging radio network temporaryidentifier (P-RNTI) if there is a paging message in the PDSCH. TheP-RNTI is common for all UEs. So UE identity (i.e. serving temporarymobile subscriber identity (S-TMSI)) is included in the paging messageto indicate paging for a specific UE. The paging message may includemultiple UE identities to page multiple UEs. The paging message isbroadcasted (i.e. PDCCH is masked with P-RNTI) over a data channel (i.e.PDSCH).

The UE monitors one PO every DRX cycle. Each PO is a set of ‘S’ PDCCHmonitoring occasions, where ‘S’ is the number of transmittedsynchronization signal blocks (SSBs) in cell. UE determines its PO basedon UE identity (ID). The UE first determines the paging frame (PF) andthen determines the PO with respect to the determined PF. One PF is aradio frame (10 ms).

The PF for a UE is the radio frame with system frame number ‘SFN’ whichsatisfies the equation (SFN+PF_offset) mod T=(T div N)*(UE_ID mod N);where PF_offset, T and N is signaled by gNB in system information. UEmonitors (i_s+1)th PO, where i_s=floor(UE_ID/N) mod Ns; where N and Nsis signaled by gNB in system information.

Paging search space signaled by the base station indicates the PDCCHmonitoring occasions for paging. Paging search space configurationcomprises of parameters Monitoring-periodicity-PDCCH-slot,Monitoring-offset-PDCCH-slot, Monitoring-symbols-PDCCH-within-slot andduration. A UE determines PDCCH monitoring occasion (s) within a slotusing the parameters PDCCH monitoring periodicity(Monitoring-periodicity-PDCCH-slot), the PDCCH monitoring offset(Monitoring-offset-PDCCH-slot), and the PDCCH monitoring pattern(Monitoring-symbols-PDCCH-within-slot). PDCCH monitoring occasions arethere in slots ‘x’ to x+duration where the slot with number ‘x’ in aradio frame with number ‘y’ satisfies the equation below:(y*(number of slots in a radioframe)+x−Monitoring-offset-PDCCH-slot)mod(Monitoring-periodicity-PDCCH-slot)=0;

The starting symbol of a PDCCH monitoring occasion in each slot havingPDCCH monitoring occasion is given byMonitoring-symbols-PDCCH-within-slot. The length (in symbols) of a PDCCHmonitoring occasion is given in the corset associated with the searchspace. search space configuration includes the identifier of coresetconfiguration associated with it. A list of coreset configurations aresignaled by GNB for each configured BWP wherein each coresetconfiguration is uniquely identified by an identifier.

The PDCCH monitoring occasions for paging which are not overlapping withUL symbols are sequentially numbered from zero starting from the 1stPDCCH monitoring occasion for paging in the PF. The PDCCH monitoringoccasions are determined based on paging search space configurationsignaled by gNB in system information. The gNB may signal parameterfirstPDCCH-MonitoringOccasionOfPO for each PO corresponding to a PF.When firstPDCCH-MonitoringOccasionOfPO is signaled, the (i_s+1)th PO isa set of ‘S’ consecutive PDCCH monitoring occasions for paging startingfrom the PDCCH monitoring occasion indicated byfirstPDCCH-MonitoringOccasionOfPO (i.e. the (i_s+1)th value of thefirstPDCCH-MonitoringOccasionOfPO parameter). Otherwise, the (i_s+1)thPO is a set of ‘S’ consecutive PDCCH monitoring occasions for pagingstarting from the (i_s*S)th PDCCH monitoring occasion for paging. ‘S’ isthe number of actual transmitted SSBs determined according to parameterssb-PositionsInBurst in SIB1.

In fifth generation wireless communication system, the receive andtransmit bandwidth of a UE need not be as large as the bandwidth of thecell and can be adjusted: the width can be ordered to change (e.g. toshrink during period of low activity to save power); the location canmove in the frequency domain (e.g. to increase scheduling flexibility);and the subcarrier spacing can be ordered to change (e.g. to allowdifferent services). A subset of the total cell bandwidth of a cell isreferred to as a Bandwidth Part (BWP).

An initial DL BWP is indicated by parameters in MIB. An initial DL BWPis defined by a location and number of contiguous PRBs, starting from aPRB with the lowest index and ending at a PRB with the highest indexamong PRBs of a CORESET for Type0-PDCCH CSS set. PRBs of CORESET forType0-PDCCH CSS set is indicated by parameter pdcch-ConfigSIB1 in MIB.The SCS of initial DL BWP is also indicated in MIB. The cyclic prefixfor PDCCH reception in the CORESET for Type0-PDCCH CSS set is normalcyclic prefix. Initial DL BWP can also be indicated by parameterinitialDownlinkBWP in SIB1. System information and paging is transmittedby the base station in an initial downlink (DL) BWP. A UE in an RRCIDLE/INACTIVE state receives the system information and paging ininitial DL BWP. Initial UL BWP is indicated by parameterinitialUplinkBWP in SIB1. If the UE is configured with a supplementaryUL carrier, the UE can be provided an initial UL BWP on thesupplementary UL carrier.

In a radio resource control (RRC) connected state, the UE is configuredwith one or more DL and uplink (UL) BWPs, for each configured ServingCell (i.e. primary cell (PCell) or secondary cell (SCell)) via RRCsignaling. There can be up to 4 configured DL and UL BWPs. For eachconfigured DL or UL BWPs, the UE is provided with SCS, cyclic prefix,information about the PRBs, BWP Id, a set of common and dedicatedparameters. Any DL BWP other than initial DL BWP is also referred asnon-initial DL BWP. Any UL BWP other than initial UL BWP is alsoreferred as non-initial UL BWP. For an activated Serving Cell, there isalways one active UL and DL BWP at any point in time. The BWP switchingfor a Serving Cell is used to activate an inactive BWP and deactivate anactive BWP at a time. The BWP switching is controlled by the PDCCHindicating a downlink assignment or an uplink grant, by thebwp-InactivityTimer, by RRC signaling, or by the medium access control(MAC) entity itself upon initiation of Random Access procedure. Uponaddition of special cell (SpCell) or activation of an SCell, the DL BWPand UL BWP indicated by firstActiveDownlinkBWP-Id andfirstActiveUplinkBWP-Id respectively is active without receiving PDCCHindicating a downlink assignment or an uplink grant. The active BWP fora Serving Cell is indicated by either RRC or PDCCH. For unpairedspectrum, a DL BWP is paired with a UL BWP, and BWP switching is commonfor both UL and DL. Upon expiry of BWP inactivity timer, UE switch tothe active DL BWP to the default DL BWP or initial DL BWP (if default DLBWP is not configured). Note that in RRC connected state, an active DLBWP can be initial DL BWP. An active UL BWP can be initial UL BWP.

[Issue 1: Paging in Multiple BWPs]

In the RRC Connected state, the active DL BWP of UE can be differentthan the initial DL BWP. As a result, UE should be able to receive thepaging in its active DL BWP. Paging needs to be transmitted by gNB notonly in initial DL BWP but also in other DL BWP(s) which is non-initialDL BWP. In the current design the parameters (T, PF_OFFSET, N, Ns andfirstPDCCH-MonitoringOccasionOfPO) to determine the PF/PO for pagingreception are broadcasted only in initial DL BWP. This design is notefficient for supporting paging in multiple BWPs. The starting PDCCHoccasion number of PO indicated by ‘firstPDCCH-MonitoringOccasionOfPO’broadcasted in SIB1 is not always valid for other DL BWPs as the numberof PDCCH monitoring occasions for paging and subcarrier spacing (SCS)can be different for different DL BWPs. Let's say N=T, Initial DL BWPSCS=30 kHz, another DL BWP SCS=15 kHz. SIB 1 indicates that startingPDCCH occasion number is 270. The range of values for PDCCH occasionnumber for SCS of 15 KHz is 0 to 139. 270 is not a valid value.

[Issue 2: SI Window Determination for Multiple BWPs]

Each SI message is transmitted within periodically occurring time domainwindows (referred to as SI-windows with same length for all SImessages). Each SI message is associated with a SI-window and theSI-windows of different SI messages do not overlap. That is, within oneSI-window only the corresponding SI message is transmitted. Whenacquiring an SI message, the UE determines the start of the SI-windowfor the concerned SI message as follows:

-   -   for the concerned SI message, the UE determines the number n        which corresponds to the order of entry in the list of SI        messages configured by schedulingInfoList in si-SchedulingInfo        in SIB1;    -   the UE determines the integer value x=(n−1)*w, where w is the        si-WindowLength; si-WindowLength in units of slots is signaled        in SIB1.    -   the SI-window starts at the slot #a, where a=x mod N, in the        radio frame for which SFN mod T=FLOOR(x/N), where T is the        si-Periodicity of the concerned SI message and N is the number        of slots in a radio frame;

The UE in RRC Idle/inactive receives SI in initial DL BWP. However inthe RRC connected state, the UE receives SI in its active DL BWP. Theactive DL BWP may not always be initial DL BWP. From network point ofview SI can be transmitted in not only initial DL BWP but also other DLBWPs. In the current design how to determine the slot length and hencenumber of slots in a radio frame for SI message acquisition isundefined.

[Issue 3: Measurement for UL Carrier Selection]

Multiple UL carriers (referred a normal uplink carrier (NUL) andsupplementary uplink carrier (SUL)) can be supported in a cell. When therandom access procedure is initiated by the UE, it selects one ULcarrier and perform physical random access channel (PRACH)transmission(s) on this UL carrier. According to current design, if thereference signal received power (RSRP) of the downlink pathlossreference is less than a configured threshold, SUL is selected.Otherwise NUL is selected. However, it is not defined how to measureRSRP to select uplink carrier.

Hereinafter, various embodiments according to the disclosure areexplained in detail to overcome above mentioned issues.

Embodiment 1—Paging Transmission and Reception Embodiment 1-1

FIG. 1 illustrates determining paging frame (PF) and paging occasion(PO) according to an embodiment of the disclosure.

In an embodiment of the disclosure, it is proposed that paging channelconfiguration comprising of parameters Default Paging Cycle Duration, N,Ns, PF_Offset and firstPDCCH-MonitoringOccasionOfPO are categorized intofirst Type of paging parameters and second Type of paging parameters.The first Type of paging parameters comprises of: Default Paging CycleDuration, N, Ns and PF_Offset. N is the number of paging frames inpaging cycle. Ns is the number of paging occasions per paging frame. Thesecond Type of paging parameters comprises offirstPDCCH-MonitoringOccasionOfPO. firstPDCCH-MonitoringOccasionOfPOindicates starting PDCCH monitoring occasion number for each PO of PF.

According to the embodiment, the first type of paging parameters aretransmitted by gNB in system information (e.g. in SIB 1). The secondtype of paging parameters are transmitted by gNB in system information(e.g. in SIB 1). The second type of paging parameters are transmitted inBWP configuration of each DL BWP in which paging is transmitted (i.e. ineach DL BWP in which paging search space is configured), where BWPconfiguration is included in dedicated signaling using RRC message (e.g.RRCReconfiguration message). The advantage is that gNB can configurestarting PDCCH monitoring occasion number of each PO depending on SCSand number of PDCCH monitoring occasions of a BWP.

In an alternate embodiment, the first Type of paging parameters compriseDefault Paging Cycle Duration, N and Ns. The second Type of pagingparameters comprise firstPDCCH-MonitoringOccasionOfPO and PF_Offset.

In an alternate embodiment, the first Type of paging parameters compriseDefault Paging Cycle Duration and N. The second Type of pagingparameters comprise firstPDCCH-MonitoringOccasionOfPO, Ns and PF_Offset.

In an alternate embodiment, the first Type of paging parameters compriseDefault Paging Cycle Duration. The second Type of paging parameterscomprise firstPDCCH-MonitoringOccasionOfPO, N, Ns and PF_Offset.

First, the UE receives paging search space configuration and pagingparameters from gNB (110). The UE uses the paging search spaceconfiguration, first Type of paging parameters and second Type of pagingparameters to determine its PF and PO. The second type of pagingparameters received from system information is used by UE in initial DLBWP and zero, one or more dedicated BWPs. The second type of pagingparameters received from RRC message (e.g. RRCReconfiguration message)and explicitly associated with a specific BWP is used by UE fordetermining PF/PO in associated BWP.

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is theinitial DL BWP (120), UE uses the following parameters for PF/POdetermination (125):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) associated with initial DL BWP. UE in RRC        IDLE/INACTIVE state receives paging search space configuration        for initial DL BWP in system information (e.g. SIB1). UE in RRC        CONNECTED state receives paging search space configuration for        initial DL BWP via RRC signaling or system information (e.g.        SIB1). Note that SIB1 can be delivered to UE in RRC connected        via dedicated signaling as well.    -   first Type of paging parameters received in system information.    -   second Type of paging parameters received in system information.

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is not theinitial DL BWP (120), UE uses the following parameters for PF/POdetermination (130):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) associated with this DL BWP, received in RRC        message (e.g. RRCReconfiguration message).    -   first Type of paging parameters received in system information.    -   second Type of paging parameters associated with this DL BWP, if        received in RRC message (e.g. RRCReconfiguration message) (140).    -   second Type of paging parameters received from system        information, if second Type of paging parameters associated with        this DL BWP is not received in RRC message (e.g.        RRCReconfiguration message) (135).

A UE in the RRC IDLE/INACTIVE state monitors paging (i.e. PDCCHaddressed to P-RNTI) in initial DL BWP. The purpose of paging monitoringin RRC IDLE/INACTIVE is to receive paging message, SI update indicationand emergency notifications. A UE in the RRC CONNECTED state monitorspaging in active DL BWP if paging search space is configured in activeDL BWP. The UE in the RRC CONNECTED state does not monitor paging inactive DL BWP if paging search space is not configured in active DL BWP.The active DL BWP can be initial DL BWP or non-initial DL BWP. Note thatthe UE in the RRC CONNECTED state does no monitor paging in DL BWP whichis not active. The purpose of paging monitoring in RRC IDLE/INACTIVE isto receive SI update indication and emergency notifications.

Based on the determined parameters (as explained above) the UEdetermines the PF and PO as follows:

The paging frame is the radio frame with SFN which satisfies equation 1below:(SFN+PF_offset)mod T=(T div N)*(UE_ID mod N)  [equation 1]

Index (i_s), indicating the start of a set of PDCCH monitoring occasionsfor the paging DCI, is determined by equation 2 below:i_s=floor(UE_ID/N)mod Ns  [equation 2]

If paging-SearchSpace is set to zero, Ns is configured either 1 or 2.For Ns=1, there is only one PO which starts from the first PDCCHmonitoring occasion for paging in the PF. For Ns=2, PO is either in thefirst half frame (i_s=0) or the second half frame (i_s=1) of the PF. Ifpaging-SearchSpace is set to zero, PDCCH monitoring occasions for pagingare same as the PDCCH monitoring occasions for SIB 1.

If paging-SearchSpace is not set to zero, the UE monitors the (i_s+1)thPO where the first PO starts in the PF. PDCCH monitoring occasions forpaging are determined according to search space configuration indicatedby paging-SearchSpace. The PDCCH monitoring occasions for paging whichare not overlapping with UL symbols are sequentially numbered from zerostarting from the 1 st PDCCH monitoring occasion for paging in the PF.When firstPDCCH-MonitoringOccasionOfPO is available, the (i_s+1)th PO isa set of ‘S’ consecutive PDCCH monitoring occasions for paging startingfrom the PDCCH monitoring occasion indicated byfirstPDCCH-MonitoringOccasionOfPO (i.e. the (i_s+1)th value of thefirstPDCCH-MonitoringOccasionOfPO parameter). Otherwise, the (i_s+1)thPO is a set of ‘S’ consecutive PDCCH monitoring occasions for pagingstarting from the (i_s*S)th PDCCH monitoring occasion for paging where‘S’ is the number of actual transmitted SSBs determined according tossb-PositionsInBurst in SystemInformationBlock1. The Kth PDCCHmonitoring occasion for paging in the PO corresponds to the Kthtransmitted SSB.

Meanwhile, the following parameters are used for the calculation of PFand i_s above:

T: DRX cycle of the UE (T is determined by the shortest of the UEspecific DRX value, if configured by RRC or upper layers, and a DefaultPaging Cycle Duration broadcast in system information. If UE specificDRX is not configured by RRC or by upper layers, the default value isapplied).

N: number of total paging frames in T

Ns: number of paging occasions for a PF

PF_offset: offset used for PF determination

UE_ID: 5G-S-TMSI mod 1024

FIG. 2 illustrates determining PF and PO according to another embodimentof the disclosure.

-   -   The UE camps on a NR cell (210)    -   The UE receives system information which contains the paging        search space configuration and first type of paging parameters        and second type of paging parameters (220).    -   The UE applies the paging search space and first type of paging        parameters and the second type of paging parameters to determine        PF/PO in the initial BWP UE monitors PDCCH addressed to P-RNTI        in the initial BWP (230).    -   The UE receives RRC control message which contains configuration        information for additional dedicate BWPs (240). Dedicate BWP can        be configured with pagingSearchSpace and second type of paging        parameters.    -   The UE switches to active DL BWP and monitors PDCCH addressed to        P-RNTI in the active DL BWP if the active DL BWP is configured        with pagingSearchSpace (250). Note that upon entering the RRC        connected state, the RRC control message indicates the first        active DL BWP. Subsequently the active DL BWP can be switched by        GNB using PDCCH or RRC signaling.    -   The UE uses the following parameters for PF/PO determination in        active DL BWP (260):        -   paging search space configuration associated with this DL            BWP, received in RRCReconfiguration message.        -   first Type of paging parameters received in system            information.        -   second Type of paging parameters associated with this DL            BWP, if received in RRC RRCReconfiguration message.        -   second Type of paging parameters received from system            information, if second Type of paging parameters associated            with this DL BWP is not received in RRCReconfiguration            message.

Embodiment 1-2

FIG. 3 illustrates determining PF and PO according to another embodimentof the disclosure.

In another embodiment of the disclosure, it is proposed that pagingchannel configuration comprising of parameters Default Paging CycleDuration, N, Ns, PF_Offset and firstPDCCH-MonitoringOccasionOfPO arecategorized into first Type of paging parameters and second Type ofpaging parameters. The first Type of paging parameters comprises of:Default Paging Cycle Duration, N, Ns and PF_Offset. N is the number ofpaging frames in paging cycle. Ns is the number of paging occasions perpaging frame. The second Type of paging parameters comprises offirstPDCCH-MonitoringOccasionOfPO. firstPDCCH-MonitoringOccasionOfPOindicates starting PDCCH monitoring occasion number for each PO of PF.

The UE receives paging search space configuration and paging parametersfrom gNB (310). Here, the first type of paging parameters aretransmitted by gNB in system information (e.g. in SIB 1). The secondtype of paging parameters are transmitted in system information (e.g. inSIB 1). The second type of paging parameters are transmitted in BWPconfiguration of each non initial DL BWP in which paging is transmitted(i.e. in each non initial DL BWP in which paging search space isconfigured), where BWP configuration is included in dedicated signalingusing RRC message (e.g. RRCReconfiguration message).

The UE uses the paging search space configuration, first Type of pagingparameters and second Type of paging parameters to determine its PF andPO. The second type of paging parameters received from systeminformation (i.e. SIB1) is used by UE in initial DL BWP. The second typeof paging parameters received from RRC message (e.g. RRCReconfigurationmessage) and explicitly associated with a specific BWP (i.e. non initialBWP) is used by UE for determining PF/PO in associated BWP i.e.,non-initial BWP.

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is theinitial DL BWP (320), UE uses the following parameters for PF/POdetermination (330):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) received in system information (e.g., SIB1)    -   first Type of paging parameters received in system information.        (e.g., SIB1)    -   second Type of paging parameters received in system information.        (e.g., SIB1)

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is not theinitial DL BWP i.e., non-initial BWP (320), UE uses the followingparameters for PF/PO determination (340):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) associated with this DL BWP, received in RRC        message (e.g. RRCReconfiguration message).    -   first Type of paging parameters received in system information.    -   second Type of paging parameters associated with this DL BWP

Based on the determined parameters (as explained above) UE determinesthe PF and PO as follows:

The paging frame is the radio frame with SFN which satisfies equation 3below:(SFN+PF_offset)mod T=(T div N)*(UE_ID mod N)  [equation 3]

Index (i_s), indicating the start of a set of PDCCH monitoring occasionsfor the paging DCI, is determined by following equation 4:i_s=floor(UE_ID/N)mod Ns  [equation 4]

If paging-SearchSpace is set to zero, Ns is configured either 1 or 2.For Ns=1, there is only one PO which starts from the first PDCCHmonitoring occasion for paging in the PF. For Ns=2, PO is either in thefirst half frame (i_s=0) or the second half frame (i_s=1) of the PF. Ifpaging-SearchSpace is set to zero, PDCCH monitoring occasions for pagingare same as the PDCCH monitoring occasions for SIB 1.

If paging-SearchSpace is not set to zero, the UE monitors the (i_s+1)thPO where the first PO starts in the PF. PDCCH monitoring occasions forpaging are determined according to search space configuration indicatedby paging-SearchSpace. The PDCCH monitoring occasions for paging whichare not overlapping with UL symbols are sequentially numbered from zerostarting from the 1st PDCCH monitoring occasion for paging in the PF.

When firstPDCCH-MonitoringOccasionOfPO is available, the (i_s+1)th PO isa set of ‘S’ consecutive PDCCH monitoring occasions for paging startingfrom the PDCCH monitoring occasion indicated byfirstPDCCH-MonitoringOccasionOfPO (i.e. the (i_s+1)th value of thefirstPDCCH-MonitoringOccasionOfPO parameter). Otherwise, the (i_s+1)thPO is a set of ‘S’ consecutive PDCCH monitoring occasions for pagingstarting from the (i_s*S)th PDCCH monitoring occasion for paging where‘S’ is the number of actual transmitted SSBs determined according tossb-PositionsInBurst in SystemInformationBlock1. The Kth PDCCHmonitoring occasion for paging in the PO corresponds to the Kthtransmitted SSB.

The following parameters are used for the calculation of PF and i_sabove:

T: DRX cycle of the UE (T is determined by the shortest of the UEspecific DRX value, if configured by RRC or upper layers, and a DefaultPaging Cycle Duration broadcast in system information. If UE specificDRX is not configured by RRC or by upper layers, the default value isapplied).

N: number of total paging frames in T

Ns: number of paging occasions for a PF

PF_offset: offset used for PF determination

UE_ID: 5G-S-TMSI mod 1024

FIG. 4 illustrates determining PF and PO according to another embodimentof the disclosure.

-   -   The UE camps on a NR cell (410)    -   The UE receives system information which contains the paging        search space configuration and first type of paging parameters        and second type of paging parameters (420).    -   The UE applies the paging search space and first type of paging        parameters and the second type of paging parameters to determine        PF/PO in the initial BWP. UE monitors PDCCH addressed to P-RNTI        in the initial BWP (430).    -   The UE receives RRC control message (e.g., RRC reconfiguration        message) which contains configuration information for additional        dedicate BWPs (440). Dedicate BWP can be configured with        pagingSearchSpace and second type of paging parameters.    -   The UE switches to active DL BWP and monitors PDCCH addressed to        P-RNTI in the active DL BWP if the active DL BWP is configured        with pagingSearchSpace (450). Note that upon entering RRC        connected state, RRC control message indicates the first active        DL BWP. Subsequently the active DL BWP can be switched by GNB        using PDCCH or RRC signaling.    -   The UE uses the following parameters for PF/PO determination in        active DL BWP (460) if active DL BWP is not the initial DL BWP:    -   paging search space configuration associated with this DL BWP,        received in RRCReconfiguration message.    -   first Type of paging parameters received in system information.    -   second Type of paging parameters associated with this DL BWP

The UE uses the following parameters for PF/PO determination in activeDL BWP (460) if the active DL BWP is the initial DL BWP:

-   -   paging search space configuration associated with this DL BWP.    -   first Type of paging parameters received in system information        (e.g. SIB1).    -   second Type of paging parameters received in system information

Embodiment 1-3

FIG. 5 illustrates determining PF and PO according to another embodimentof the disclosure.

In another embodiment of the disclosure, it is proposed that pagingchannel configuration comprising of parameters Default Paging CycleDuration, N, Ns, PF_Offset and firstPDCCH-MonitoringOccasionOfPO istransmitted in system information (e.g. in SIB 1). The paging channelconfiguration comprising of parameters Default Paging Cycle Duration, N,Ns, PF_Offset and firstPDCCH-MonitoringOccasionOfPO is also transmittedin BWP configuration of each DL BWP in which paging is transmitted (i.e.in each DL BWP in which paging search space is configured), where BWPconfiguration is included in dedicated signaling using RRC message (e.g.RRCReconfiguration message).

The UE receives paging search space configuration and paging channelconfiguration from gNB (510). UE uses the paging search spaceconfiguration and paging channel configuration to determine its PF andPO. The paging channel configuration received from system information isused by UE in initial DL BWP and zero, one or more dedicated BWPs. Thepaging channel configuration received from RRC message (e.g.RRCReconfiguration message) and explicitly associated with a specificBWP is used by UE for determining PF/PO in associated BWP.

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is theinitial DL BWP (520), UE uses the following parameters for PF/POdetermination (530):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) received in system information    -   paging channel configuration received in system information

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is not theinitial DL BWP (520), UE uses the following parameters for PF/POdetermination (540):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) associated with this DL BWP, received in RRC        message (e.g. RRCReconfiguration message).    -   paging channel configuration associated with this DL BWP, if        received in RRC message (e.g. RRCReconfiguration message) (560).    -   paging channel configuration received from system information,        if paging channel configuration associated with this DL BWP is        not received in RRC message (e.g. RRCReconfiguration message)        (550).

Based on the determined parameters (as explained above) UE determinesthe PF and PO as follows:

The paging frame is the radio frame with SFN which satisfies equation 5below:(SFN+PF_offset)mod T=(T div N)*(UE_ID mod N)  [equation 5]

Index (i_s), indicating the start of a set of PDCCH monitoring occasionsfor the paging DCI, is determined by equation 6 below:i_s=floor(UE_ID/N)mod Ns  [equation 6]

If paging-SearchSpace is set to zero, Ns is configured either 1 or 2.For Ns=1, there is only one PO which starts from the first PDCCHmonitoring occasion for paging in the PF. For Ns=2, PO is either in thefirst half frame (i_s=0) or the second half frame (i_s=1) of the PF. Ifpaging-SearchSpace is set to zero, PDCCH monitoring occasions for pagingare same as the PDCCH monitoring occasions for SIB 1.

If paging-SearchSpace is not set to zero, the UE monitors the (i_s+1)thPO where the first PO starts in the PF. PDCCH monitoring occasions forpaging are determined according to search space configuration indicatedby paging-SearchSpace. The PDCCH monitoring occasions for paging whichare not overlapping with UL symbols are sequentially numbered from zerostarting from the 1st PDCCH monitoring occasion for paging in the PF.

When firstPDCCH-MonitoringOccasionOfPO is available, the (i_s+1)th PO isa set of ‘S’ consecutive PDCCH monitoring occasions for paging startingfrom the PDCCH monitoring occasion indicated byfirstPDCCH-MonitoringOccasionOfPO (i.e. the (i_s+1)th value of thefirstPDCCH-MonitoringOccasionOfPO parameter). Otherwise, the (i_s+1)thPO is a set of ‘S’ consecutive PDCCH monitoring occasions for pagingstarting from the (i_s*S)th PDCCH monitoring occasion for paging where‘S’ is the number of actual transmitted SSBs determined according tossb-PositionsInBurst in SystemInformationBlock1. The Kth PDCCHmonitoring occasion for paging in the PO corresponds to the Kthtransmitted SSB.

The following parameters are used for the calculation of PF and i_sabove:

T: DRX cycle of the UE (T is determined by the shortest of the UEspecific DRX value, if configured by RRC or upper layers, and a DefaultPaging Cycle Duration broadcast in system information. If UE specificDRX is not configured by RRC or by upper layers, the default value isapplied).

N: number of total paging frames in T

Ns: number of paging occasions for a PF

PF_offset: offset used for PF determination

UE_ID: 5G-S-TMSI mod 1024

FIG. 6 illustrates determining PF and PO according to another embodimentof the disclosure.

-   -   The UE camps on a NR cell (610)    -   The UE receives system information which contains the paging        search space configuration and paging channel configuration        (620).    -   The UE applies the paging search space and paging channel        configuration to determine PF/PO in the initial BWP. UE monitors        PDCCH addressed to P-RNTI in the initial BWP (630).    -   The UE receives RRC control message which contains configuration        information for additional dedicate BWPs (640). Dedicate BWP can        be configured with pagingSearchSpace and paging channel        configuration.    -   The UE switches to active DL BWP and monitors PDCCH addressed to        P-RNTI in the active DL BWP if the active DL BWP is configured        with pagingSearchSpace (650).    -   The UE uses the following parameters for PF/PO determination in        active DL BWP (660):        -   paging search space configuration associated with this DL            BWP, received in RRCReconfiguration message.        -   paging channel configuration associated with this DL BWP, if            received in RRC RRCReconfiguration message.        -   paging channel configuration received from system            information, if paging channel configuration associated with            this DL BWP is not received in RRCReconfiguration message.

Embodiment 1-4

FIG. 7 illustrates determining PF and PO according to another embodimentof the disclosure.

In another embodiment of the disclosure, it is proposed that pagingchannel configuration comprising of parameters Default Paging CycleDuration, N, Ns, PF_Offset and firstPDCCH-MonitoringOccasionOfPO istransmitted in system information (e.g. in SIB 1) and The paging channelconfiguration comprising of parameters Default Paging Cycle Duration, N,Ns, PF_Offset and firstPDCCH-MonitoringOccasionOfPO is also transmittedin BWP configuration of each DL BWP in which paging is transmitted (i.e.in each DL BWP in which paging search space is configured), where BWPconfiguration is included in dedicated signaling using RRC message (e.g.RRCReconfiguration message).

The UE receives paging search space configuration and paging channelconfiguration from gNB (710). UE uses the paging search spaceconfiguration and paging channel configuration to determine its PF andPO. The paging channel configuration received from system information isused by UE in initial DL BWP. The paging channel configuration receivedfrom RRC message (e.g. RRCReconfiguration message) and explicitlyassociated with a specific BWP is used by UE for determining PF/PO inassociated BWP.

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is theinitial DL BWP (720), UE uses the following parameters for PF/POdetermination (730):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) received in system information    -   paging channel configuration received in system information

If the DL BWP in which UE monitors PDCCH addressed to P-RNTI is not theinitial DL BWP (720), UE uses the following parameters for PF/POdetermination (740):

-   -   paging search space configuration (indicated by parameter        paging-SearchSpace) associated with this DL BWP, received in RRC        message (e.g. RRCReconfiguration message) (750, 760).    -   paging channel configuration associated with this DL BWP, if        paging channel configuration is received in dedicated signaling        for this DL BWP (760). Otherwise, paging channel configuration        received in system information (750).

Based on the determined parameters (as explained above) UE determinesthe PF and PO as follows:

The paging frame is the radio frame with SFN which satisfies equation 7below:(SFN+PF_offset)mod T=(T div N)*(UE_ID mod N)  [equation 7]

Index (i_s), indicating the start of a set of PDCCH monitoring occasionsfor the paging DCI, is determined by following equation 8:i_s=floor(UE_ID/N)mod Ns  [equation 8]

If paging-SearchSpace is set to zero, Ns is configured either 1 or 2.For Ns=1, there is only one PO which starts from the first PDCCHmonitoring occasion for paging in the PF. For Ns=2, PO is either in thefirst half frame (i_s=0) or the second half frame (i_s=1) of the PF. Ifpaging-SearchSpace is set to zero, PDCCH monitoring occasions for pagingare same as the PDCCH monitoring occasions for SIB 1.

If paging-SearchSpace is not set to zero, the UE monitors the (i_s+1)thPO where the first PO starts in the PF. PDCCH monitoring occasions forpaging are determined according to search space configuration indicatedby paging-SearchSpace. The PDCCH monitoring occasions for paging whichare not overlapping with UL symbols are sequentially numbered from zerostarting from the 1st PDCCH monitoring occasion for paging in the PF.

When firstPDCCH-MonitoringOccasionOfPO is available, the (i_s+1)th PO isa set of ‘S’ consecutive PDCCH monitoring occasions for paging startingfrom the PDCCH monitoring occasion indicated byfirstPDCCH-MonitoringOccasionOfPO (i.e. the (i_s+1)th value of thefirstPDCCH-MonitoringOccasionOfPO parameter). Otherwise, the (i_s+1)thPO is a set of ‘S’ consecutive PDCCH monitoring occasions for pagingstarting from the (i_s*S)th PDCCH monitoring occasion for paging where‘S’ is the number of actual transmitted SSBs determined according tossb-PositionsInBurst in SystemInformationBlock1. The Kth PDCCHmonitoring occasion for paging in the PO corresponds to the Kthtransmitted SSB.

The following parameters are used for the calculation of PF and i_sabove:

T: DRX cycle of the UE (T is determined by the shortest of the UEspecific DRX value, if configured by RRC or upper layers, and a DefaultPaging Cycle Duration broadcast in system information. If UE specificDRX is not configured by RRC or by upper layers, the default value isapplied).

N: number of total paging frames in T

Ns: number of paging occasions for a PF

PF_offset: offset used for PF determination

UE_ID: 5G-S-TMSI mod 1024

FIG. 8 illustrates determining PF and PO according to another embodimentof the disclosure.

-   -   The UE camps on a NR cell (810)    -   The UE receives system information which contains the paging        search space configuration and paging channel configuration        (820).    -   The UE applies the paging search space and paging channel        configuration to determine PF/PO in the initial BWP. UE monitors        PDCCH addressed to P-RNTI in the initial BWP (830).    -   The UE receives RRC control message which contains configuration        information for additional dedicate BWPs (840). Dedicate BWP can        be configured with pagingSearchSpace and paging channel        configuration.    -   The UE switches to active DL BWP and monitors PDCCH addressed to        P-RNTI in the active DL BWP if the active DL BWP is configured        with pagingSearchSpace (850).    -   UE uses the following parameters for PF/PO determination in        active DL BWP (860):    -   paging search space configuration associated with this DL BWP,        received in RRCReconfiguration message.    -   paging channel configuration associated with this DL BWP.

Embodiment 2—SI Window Determination

In the 5th generation wireless communication system, SIBs other thanSIB1 are carried in SystemInformation (SI) messages, which aretransmitted on the DL-SCH. SIBs having the same periodicity can bemapped to the same SI message. Each SI message is transmitted withinperiodically occurring time domain windows (referred to as SI-windowswith same length for all SI messages).

SI window length (common for all SI messages) and SI periodicity of eachSI message is received by UE in SIB 1. UE in RRC Idle/inactive receivesSI message(s) in initial DL BWP. However in RRC connected state, UEreceives SI message(s) in its active DL BWP if common search space isconfigured in active DL BWP. The active DL BWP may not always be initialDL BWP.

Embodiment 2-1

FIG. 9 illustrates determining system information (SI) window accordingto another embodiment of the disclosure.

1. The UE receives, from SIB1, si-WindowLength in units of slots and SIperiodicity (T) is units of radio frames.

2. The UE determines the SCS of DL BWP in which SI message needs to beacquired (910).

-   -   The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.

3. The UE determines N=number of slots in a radio frame (920)

-   -   A. This is determined based on SCS of DL BWP in which SI message        needs to be received by UE. The SCS of dedicated DL BWP is        received in BWP configuration included in dedicated signaling        using RRC message (e.g. RRCReconfiguration message). The SCS of        initial DL BWP is received in SIB 1.    -   B. The slot length for each SCS is pre-defined. The number of        slots per radio frame for each SCS is pre-defined (10 slots for        SCS equals to 15 KHz; 20 slots for SCS equals to 30 KHz; 40        slots for SCS equals to 60 KHz; 80 slots for SCS equals to 120        KHz; 160 slots for SCS equals to 240 KHz).

4. The UE determines for the concerned SI message, the number n whichcorresponds to the order of entry in the list of SI messages configuredby schedulingInfoList in si-SchedulingInfo in SIB1 (930).

5. The UE determine the integer value x=(n−1)*w (940).

6. The SI-window starts at the slot #a, where a=x mod N, in the radioframe for which SFN mod T=FLOOR(x/N), where T is the si-Periodicity ofthe concerned SI message and N is the number of slots in a radio frame(950).

7. SI window consists of ‘w’ consecutive slots starting from slot #a,wherein length of each slot is determined according to SCS of DL BWP inwhich SI message needs to be acquired (950).

-   -   A. The length of each slot is determined based on SCS of DL BWP        in which SI message needs to be received by UE. The slot length        for each SCS is pre-defined (1 ms for SCS equals to 15 kHz; 0.5        ms for SCS equals to 30 kHz; 0.25 ms for SCS equals to 60 kHz;        0.125 ms for SCS equals to 120 kHz).    -   B. The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.    -   C. In this method SI window length ‘w’ in units of slots is same        for any DL BWP in which SI message is acquired. However absolute        duration in milliseconds can be different for different DL BWP        as the duration of each slot depends on SCS which can be        different for different BWP.

The UE then acquires the concerned SI message in one or more SIwindow(s) of SI message.

Embodiment 2-2

FIG. 10 illustrates determining SI window according to anotherembodiment of the disclosure.

1. The UE receives si-WindowLength in units of slots and SI periodicity(T) is units of radio frames from SIB 1 (1010).

2. The UE determine the SCS (u) of DL BWP in which SI message needs tobe acquired (1020).

-   -   The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.

3. The UE determines w=length of SI window in number of slots inSI-window=si-WindowLength*2u, ‘u’ is the SCS index of SCS of DL BWP inwhich SI needs to be received. si-WindowLength is received in SIB 1(1030).

-   -   A. ‘u’ equals zero for SCS of 15 KHz; ‘u’ equals one for SCS of        30 KHz; ‘u’ equals two for SCS of 60 KHz; ‘u’ equals three for        SCS of 120 KHz; ‘u’ equals four for SCS of 240 KHz;    -   B. Length of each slot is determined based on SCS of DL BWP in        which SI message needs to be received by UE. The slot length for        each SCS is pre-defined (1 ms for SCS equals to 15 KHz; 0.5 ms        for SCS equals to 30 KHz; 0.25 ms for SCS equals to 60 KHz;        0.125 slots for SCS equals to 120 KHz).    -   C. The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.    -   D. In this method si-WindowLength in units of slots is        configured for a reference SCS of 15 KHz.

4. The UE determine N=number of slots in a radio frame (1040)

-   -   A. This is determined based on SCS of DL BWP in which SI message        needs to be received by UE. The SCS of dedicated DL BWP is        received in BWP configuration included in dedicated signaling        using RRC message (e.g. RRCReconfiguration message). The SCS of        initial DL BWP is received in SIB 1.    -   B. The slot length for each SCS is pre-defined. The number of        slots per radio frame for each SCS is pre-defined (10 slots for        SCS equals to 15 KHz; 20 slots for SCS equals to 30 KHz; 40        slots for SCS equals to 60 KHz; 80 slots for SCS equals to 120        KHz; 160 slots for SCS equals to 240 KHz).

5. The UE determines for the concerned SI message, the number n whichcorresponds to the order of entry in the list of SI messages configuredby schedulingInfoList in si-SchedulingInfo in SIB 1 (1050);

6. The UE determine the integer value x=(n−1)*w (1060).

7. SI window consists of ‘w’ consecutive slots starting from slot #a,wherein length of each slot is determined according to SCS of DL BWP inwhich SI message needs to be acquired (1070).

-   -   A. The length of each slot is determined based on SCS of DL BWP        in which SI message needs to be received by UE. The slot length        for each SCS is pre-defined (1 ms for SCS equals to 15 KHz; 0.5        ms for SCS equals to 30 KHz; 0.25 ms for SCS equals to 60 KHz;        0.125 slots for SCS equals to 120 KHz).    -   B. The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.    -   C. In this method SI window length ‘w’ in units of slots is same        for any DL BWP in which SI message is acquired. However absolute        duration in milliseconds can be different for different DL BWP        as the duration of each slot depends on SCS which can be        different for different BWP.

The UE then acquires the concerned SI message in one or more SIwindow(s) of SI message.

Embodiment 2-3

FIG. 11 illustrates determining SI window according to anotherembodiment of the disclosure.

1. The UE receives si-WindowLength in units of slots and SI periodicity(T) is units of radio frames from SIB 1

2. The UE determine the SCS of DL BWP in which SI message needs to beacquired.

-   -   The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.

3. The UE determines w=length of SI window in number of slots inSI-window (1120, 1130). It is equal to si-WindowLength received in SIB 1if SI message needs to be acquired in initial DL BWP (1110, 1130);Otherwise it is equal to si-WindowLength received in dedicated signalingusing RRC message (e.g. RRCReconfiguration message) corresponding to DLBWP in which SI message needs to be acquired (1110, 1120). In anembodiment, if si-WindowLength is not signaled in dedicated signalingusing RRC message (e.g. RRCReconfiguration message) corresponding to DLBWP in which SI message needs to be acquired, UE uses si-WindowLengthreceived in system information.

4. The UE determine the SCS (u) of DL BWP in which SI message needs tobe acquired (1140).

-   -   A. Length of each slot is determined based on SCS of DL BWP in        which SI message needs to be received by UE. The slot length for        each SCS is pre-defined (1 ms for SCS equals to 15 KHz; 0.5 ms        for SCS equals to 30 KHz; 0.25 ms for SCS equals to 60 KHz;        0.125 slots for SCS equals to 120 KHz).    -   B. The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.

5. The UE determines N=number of slots in a radio frame (1150)

6. The UE determines for the concerned SI message, the number n whichcorresponds to the order of entry in the list of SI messages configuredby schedulingInfoList in si-SchedulingInfo in SIB1; (1160)

7. The UE determine the integer value x=(n−1)*w. (1170)

-   -   A. This is determined based on SCS of DL BWP in which SI message        needs to be received by UE. The SCS of dedicated DL BWP is        received in BWP configuration included in dedicated signaling        using RRC message (e.g. RRCReconfiguration message). The SCS of        initial DL BWP is received in SIB 1.    -   B. The slot length for each SCS is pre-defined. The number of        slots per radio frame for each SCS is pre-defined (10 slots for        SCS equals to 15 KHz; 20 slots for SCS equals to 30 KHz; 40        slots for SCS equals to 60 KHz; 80 slots for SCS equals to 120        KHz; 160 slots for SCS equals to 240 KHz).

8. SI window consists of ‘w’ consecutive slots starting from slot #a,wherein length of each slot is determined according to SCS of DL BWP inwhich SI message needs to be acquired (1180).

-   -   A. The length of each slot is determined based on SCS of DL BWP        in which SI message needs to be received by UE. The slot length        for each SCS is pre-defined (1 ms for SCS equals to 15 KHz; 0.5        ms for SCS equals to 30 KHz; 0.25 ms for SCS equals to 60 KHz;        0.125 slots for SCS equals to 120 KHz).    -   B. The SCS of dedicated DL BWP is received in BWP configuration        included in dedicated signaling using RRC message (e.g.        RRCReconfiguration message). The SCS of initial DL BWP is        received in SIB 1.    -   C. In this method SI window length ‘w’ in units of slots is same        for any DL BWP in which SI message is acquired. However absolute        duration in milliseconds can be different for different DL BWP        as the duration of each slot depends on SCS which can be        different for different BWP.

The UE then acquires the concerned SI message in one or more SIwindow(s) of SI message.

Embodiment 3—UL Carrier Selection Embodiment 3-1

Multiple UL carriers (referred a normal uplink carrier (NUL) andsupplementary uplink carrier (SUL)) can be supported in a serving cell.When the random access procedure is initiated by UE, it selects one ULcarrier and performs PRACH transmission(s) on this UL carrier. If thecarrier to use for the Random Access procedure is not explicitlysignaled by gNB and if the Serving Cell for the Random Access procedureis configured with supplementaryUplink, the UE select between normalUplink carrier and supplementary carrier as follows:

1> if nrofSS-BlocksToAverage is not configured in serving cell; or

1> if absThreshSS-BlocksConsolidation is not configured in serving cell;or

1> if the synchronization signal RSRP (SS-RSRP) of SSB with highestSS-RSRP is below or equal to absThreshSS-BlocksConsolidation:

-   -   2> RSRP for uplink carrier selection is the SS-RSRP of SSB with        highest SS-RSRP.

1> else:

-   -   2> RSRP for uplink carrier selection is the linear power scale        average of the SS-RSRP of SSB(s) above        absThreshSS-BlocksConsolidation, where the total number of        averaged SSBs shall not exceed nrofSS-BlocksToAverage.

1> if the RSRP for uplink carrier selection is less thanrsrp-ThresholdSSB-SUL:

-   -   2> select the SUL carrier for performing Random Access        procedure;

1> else:

-   -   2> select the NUL carrier for performing Random Access        procedure;

In above description SS-RSRP of SSB refers to SS-RSRP of SSB of servingcell. UE measures SS-RSRP over the SSBs transmitted by serving cell.

The parameters nrofSS-BlocksToAverage, absThreshSS-BlocksConsolidationand absThreshSS-BlocksConsolidation can be configured by gNB in systeminformation and/or measurement configuration for one or morefrequencies. In RRC idle/inactive state, UE can use the parametersnrofSS-BlocksToAverage, absThreshSS-BlocksConsolidation andabsThreshSS-BlocksConsolidation configured in system informationcorresponding to serving cell. In the RRC Connected state the UE can usethe parameters nrofSS-BlocksToAverage, absThreshSS-BlocksConsolidationand absThreshSS-BlocksConsolidation configured in measurementconfiguration corresponding to serving cell. If measurementconfiguration does not include these parameters for serving cell, the UEcan use the parameters nrofSS-BlocksToAverage,absThreshSS-BlocksConsolidation and absThreshSS-BlocksConsolidationconfigured in system information corresponding to serving cell. Theparameter rsrp-ThresholdSSB-SUL is configured in rach configuration(signaled in SI, dedicated RRC signaling).

Embodiment 3-2

Multiple UL carriers including a NUL and a SUL can be supported in aserving cell. When the random access procedure is initiated by UE, itselects one UL carrier and performs PRACH transmission(s) on this ULcarrier. If the carrier to use for the Random Access procedure is notexplicitly signaled by gNB and if the Serving Cell for the Random Accessprocedure is configured with supplementaryUplink, the UE selects betweennormal Uplink carrier and supplementary carrier as follows:

1> if the SS-RSRP of SSB with highest SS-RSRP is less thanrsrp-ThresholdSSB-SUL:

-   -   2> select the SUL carrier for performing Random Access        procedure;

1> else:

-   -   2> select the NUL carrier for performing Random Access        procedure,

In the above description SS-RSRP of SSB refers to SS-RSRP of SSB ofserving cell. UE measures SS-RSRP over the SSBs transmitted by servingcell.

Embodiment 3-3

Multiple UL carriers including a NUL and a SUL can be supported in aserving cell. When the random access procedure is initiated by UE, itselects one UL carrier and performs PRACH transmission(s) on this ULcarrier. If the carrier to use for the Random Access procedure is notexplicitly signaled by gNB and if the Serving Cell for the Random Accessprocedure is configured with supplementaryUplink, the UE select betweennormal Uplink carrier and supplementary carrier as follows:

1> if the SS-RSRP of SSB selected for determining random access resourcefor PRACH transmission is less than rsrp-ThresholdSSB-SUL:

-   -   2> select the SUL carrier for performing Random Access        procedure;

1> else:

-   -   2> select the NUL carrier for performing Random Access        procedure,

In above description SS-RSRP of SSB refers to SS-RSRP of SSB of servingcell. UE measures SS-RSRP over the SSBs transmitted by serving cell.

Embodiment 3-4

Multiple UL carriers including a NUL and a SUL can be supported in aserving cell. When the random access procedure is initiated by UE, itselects one UL carrier and performs PRACH transmission(s) on this ULcarrier. If the carrier to use for the Random Access procedure is notexplicitly signaled by gNB and if the Serving Cell for the Random Accessprocedure is configured with supplementaryUplink, the UE select betweennormal Uplink carrier and supplementary carrier as follows:

If the UL carrier selection is performed once at the beginning of randomaccess procedure, then UE select the UL carrier as described inmethod 1. If the UL carrier selection is performed before every RApreamble transmission during the random access procedure, then UE selectthe UL carrier as described in method 2/3.

FIG. 12 illustrates a block diagram of a terminal according to anembodiment of the disclosure.

Referring to FIG. 12, a terminal includes a transceiver 1210, acontroller 1220 and a memory 1230. The transceiver 1210, the controller1220 and the memory 1230 are configured to perform the operations of theUE illustrated in the figures, e.g. FIGS. 1 to 11, or described above.Although the transceiver 1210, the controller 1220 and the memory 1230are shown as separate entities, they may be realized as a single entitylike a single chip. Or, the transceiver 1210, the controller 1220 andthe memory 1230 may be electrically connected to or coupled with eachother.

The transceiver 1210 may transmit and receive signals to and from othernetwork entities, e.g., a BS.

The controller 1220 may control the UE to perform functions according toone of the embodiments described above. The controller 1220 may refer toa circuitry, an ASIC, or at least one processor.

In an embodiment, the operations of the terminal may be implementedusing the memory 1230 storing corresponding program codes. Specifically,the terminal may be equipped with the memory 1230 to store program codesimplementing desired operations. To perform the desired operations, thecontroller 1220 may read and execute the program codes stored in thememory 1230 by using a processor or a central processing unit (CPU).

FIG. 13 illustrates a block diagram of a BS according to an embodimentof the disclosure.

Referring to FIG. 13, a BS includes a transceiver 1310, a controller1320 and a memory 1330. The transceiver 1310, the controller 1320 andthe memory 1330 are configured to perform the operations of the network(e.g., gNB) illustrated in the figures, e.g. FIGS. 1 to 11, or describedabove. Although the transceiver 1310, the controller 1320 and the memory1330 are shown as separate entities, they may be realized as a singleentity like a single chip. The transceiver 1310, the controller 1320 andthe memory 1330 may be electrically connected to or coupled with eachother.

The transceiver 1310 may transmit and receive signals to and from othernetwork entities, e.g., a terminal.

The controller 1320 may control the BS to perform functions according toone of the embodiments described above. The controller 1320 may refer toa circuitry, an ASIC, or at least one processor.

In an embodiment, the operations of the BS may be implemented using thememory 1330 storing corresponding program codes. Specifically, the BSmay be equipped with the memory 1330 to store program codes implementingdesired operations. To perform the desired operations, the controller1320 may read and execute the program codes stored in the memory 1330 byusing a processor or a CPU.

While the disclosure has been shown and described with reference tovarious embodiments thereof, it will be understood by those skilled inthe art that various changes in form and details may be made thereinwithout departing from the scope of the disclosure as defined by theappended claims and their equivalents.

As described above, embodiments disclosed in the specification anddrawings are merely used to present specific examples to easily explainthe contents of the disclosure and to help understanding, but are notintended to limit the scope of the disclosure. Accordingly, the scope ofthe disclosure should be analyzed to include all changes ormodifications derived based on the technical concept of the disclosurein addition to the embodiments disclosed herein.

Although the present disclosure has been described with variousembodiments, various changes and modifications may be suggested to oneskilled in the art. It is intended that the present disclosure encompasssuch changes and modifications as fall within the scope of the appendedclaims.

What is claimed is:
 1. A method performed by a terminal in a wirelesscommunication system, the method comprising: receiving, from a basestation, a system information block (SIB) including at least oneparameter for a paging; identifying information indicating a firstphysical downlink control channel (PDCCH) monitoring occasion of apaging occasion (PO) of a paging frame (PF) for a downlink bandwidthpart (BWP); and receiving, from the base station on the downlink BWP, apaging message based on a PDCCH addressed to a paging radio networktemporary identifier (P-RNTI) by monitoring the PO of the PF based onthe at least one parameter, wherein the monitoring starts from the firstPDCCH monitoring occasion indicated by the information on the PO.
 2. Themethod of claim 1, further comprising: receiving, from the base station,a radio resource control (RRC) message configuring the downlink BWP,wherein, in case that the downlink BWP is a non-initial downlink BWP,the information indicating the first PDCCH monitoring occasion isincluded in the RRC message, and wherein the at least one parameterincludes a paging cycle duration, a number of paging frames in a pagingcycle, a number of paging occasions in a paging frame, and a pagingframe offset.
 3. The method of claim 1, wherein, in case that thedownlink BWP is an initial downlink BWP, the information indicating thefirst PDCCH monitoring occasion is included in the SIB received from thebase station, and wherein the at least one parameter includes a pagingcycle duration, a number of paging frames in a paging cycle, a number ofpaging occasions in a paging frame, and a paging frame offset.
 4. Themethod of claim 1, wherein the paging message is received on an initialdownlink BWP, in case that the terminal is in a radio resource control(RRC) idle state, and wherein the paging message is received on anon-initial downlink BWP, in case that the terminal is in an RRCconnected state.
 5. A method performed by a base station in a wirelesscommunication system, the method comprising: transmitting, to aterminal, a system information block (SIB) including at least oneparameter for a paging; and transmitting, to the terminal on a downlinkbandwidth part (BWP), a paging message based on a physical downlinkcontrol channel (PDCCH) addressed to a paging radio network temporaryidentifier (P-RNTI), wherein the paging message is transmitted in apaging occasion (PO) of a paging frame (PF) based on the at least oneparameter, and a monitoring of the PO starts from a first PDCCHmonitoring occasion indicated by information transmitted to the terminalfor the downlink BWP.
 6. The method of claim 5, further comprising:transmitting, to the terminal, a radio resource control (RRC) messageconfiguring the downlink BWP, wherein, in case that the downlink BWP isa non-initial downlink BWP, the information indicating the first PDCCHmonitoring occasion is included in the RRC message, and wherein the atleast one parameter includes a paging cycle duration, a number of pagingframes in a paging cycle, a number of paging occasions in a pagingframe, and a paging frame offset.
 7. The method of claim 5, wherein, incase that the downlink BWP is an initial downlink BWP, the informationindicating the first PDCCH monitoring occasion is included in the SIBtransmitted to the terminal, and wherein the at least one parameterincludes a paging cycle duration, a number of paging frames in a pagingcycle, a number of paging occasions in a paging frame, and a pagingframe offset.
 8. The method of claim 5, wherein the paging message istransmitted on an initial downlink BWP, in case that the terminal is ina radio resource control (RRC) idle state, and wherein the pagingmessage is transmitted on a non-initial downlink BWP, in case that theterminal is in a RRC connected state.
 9. A terminal in a wirelesscommunication system, the terminal comprising: a transceiver configuredto transmit and receive a signal; and a controller configured to:receive, from a base station, a system information block (SIB) includingat least one parameter for a paging, identify information indicating afirst physical downlink control channel (PDCCH) monitoring occasion of apaging occasion (PO) of a paging frame (PF) for a downlink bandwidthpart (BWP), and receive, from the base station on the downlink BWP, apaging message based on a PDCCH addressed to a paging radio networktemporary identifier (P-RNTI) by monitoring the PO of the PF based onthe at least one parameter, wherein the monitoring starts from the firstPDCCH monitoring occasion indicated by the information on the PO. 10.The terminal of claim 9, wherein the controller is further configured toreceive, from the base station, a radio resource control (RRC) messageconfiguring the downlink BWP, wherein, in case that the downlink BWP isa non-initial downlink BWP, the information indicating the first PDCCHmonitoring occasion is included in the RRC message, and wherein the atleast one parameter includes a paging cycle duration, a number of pagingframes in a paging cycle, a number of paging occasions in a pagingframe, and a paging frame offset.
 11. The terminal of claim 9, wherein,in case that the downlink BWP is an initial downlink BWP, theinformation indicating the first PDCCH monitoring occasion is includedin the SIB received from the base station, and wherein the at least oneparameter includes a paging cycle duration, a number of paging frames ina paging cycle, a number of paging occasions in a paging frame, and apaging frame offset.
 12. The terminal of claim 9, wherein the pagingmessage is received on an initial downlink BWP, in case that theterminal is in a radio resource control (RRC) idle state, and whereinthe paging message is received on a non-initial downlink BWP, in casethat the terminal is in an RRC connected state.
 13. A base station in awireless communication system, the base station comprising: atransceiver configured to transmit and receive a signal; and acontroller configured to: transmit, to a terminal, a system informationblock (SIB) including at least one parameter for a paging, and transmit,to the terminal on a downlink bandwidth part (BWP), a paging messagebased on a physical downlink control channel (PDCCH) addressed to apaging radio network temporary identifier (P-RNTI), wherein the pagingmessage is transmitted in a paging occasion (PO) of a paging frame (PF)based on the at least one parameter, and a monitoring of the PO startsfrom a first PDCCH monitoring occasion indicated by informationtransmitted to the terminal for the downlink BWP.
 14. The base stationof claim 13, wherein the controller is further configured to transmit,to the terminal, a radio resource control (RRC) message configuring thedownlink BWP, wherein, in case that the downlink BWP is a non-initialdownlink BWP, the information indicating the first PDCCH monitoringoccasion is included in the RRC message, and wherein the at least oneparameter includes a paging cycle duration, a number of paging frames ina paging cycle, a number of paging occasions in a paging frame, and apaging frame offset.
 15. The base station of claim 13, wherein, in casethat the downlink BWP is an initial downlink BWP, the informationindicating the first PDCCH monitoring occasion is included in the SIBtransmitted to the terminal, and wherein the at least one parameterincludes a paging cycle duration, a number of paging frames in a pagingcycle, a number of paging occasions in a paging frame, and a pagingframe offset.
 16. The base station of claim 13, wherein the pagingmessage is transmitted on an initial downlink BWP, in case that theterminal is in a radio resource control (RRC) idle state, and whereinthe paging message is transmitted on a non-initial downlink BWP, in casethat the terminal is in a RRC connected state.